moron       
noun [ C ]  informal uk/ˈmɔː.rɒn/ us/ˈmɔːr.ɑːn/
 蠢人,傻子,笨蛋
a very stupid person
  Some moron smashed into the back of my car yesterday. 昨天一个笨蛋追了我的车尾。 
 [ as form of address ] You moron! 你这个笨蛋! 
 Synonyms: blockhead bonehead cretin dimwit dolt doofus dullard dunce dunderhead half-wit idiotimbecileknucklehead nitwit numskull